货币基金组织估计，如果波动率的两个标准差超过了1990年以后的平均值，新兴市场的利差将扩大两倍。
The IMF reckons that, if volatility moved to two standard deviations above its post-1990 average, emerging-market debt spreads would more than double.
研究人群中的平均依从率为96.3％（标准差,SD：7.7）。
The mean adherence rate in the study population was 96.3% (standard deviation, SD: 7.7).
用12个区域来测量收缩期圆周应变时间和应变率，并用应不峰值时间和应不率的标准差来表示心肌不同步。
Time to peak systolic circumferential strain and strain rate were measured in 12 segments, and myocardial dyssynchrony was expressed as the SD of time to peak strain and strain rate.
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